L121, L135, Wormline Peckoltia

Geographic Origin and Biotope: Originating from the Branco and Takutu river basins, on the border between Brazil and Guyana. Inhabits crystal clear rivers, hiding among large rounded granite boulders, submerged roots and in rock crevices in moderate waters.

Taxonomy and Morphology: Worm-line Peckoltia (L121 / L135 / Peckoltia braueri). Stocky and armored species. It is known for the characteristic "worm-like" pattern on its head, which clearly distinguishes it from the straight stripes of other related Peckoltia (like P. vittata).

Social Behavior: Quiet and benthic, with crepuscular and nocturnal habits. Although tolerant in the community, males develop a strong territoriality towards conspecifics for the control of caves. They often engage in shoulder-to-shoulder "pushing" matches.

Coloration and Sexual Dimorphism: Golden or mustard yellow base color with dense and irregular dark lines (worm-lines) on the snout, which become wide vertical bands on the body. Adult males with larger heads and conspicuous odontodes (spinosity) on the posterior half of the body.

Aquarium Setup: Tank of at least 80 cm (32 inches). Recreate a mixed sand/rock bottom with countless tubular terracotta or wood refuges, so that each specimen has a den. Well-moved and oxygenated water (via powerhead).

Diet and Feeding: Omnivore (Aufwuchs). Scrapes biofilms but needs proteins. Administer bloodworms, frozen tubifex, sinking tablets and, periodically, slices of blanched zucchini and peas. It is not an efficient algae-eater.

Water Quality: Requires very clean and highly oxygenated waters, with constant warm temperatures (24-28°C / 75-82°F) and acidic or sub-neutral pH (5.5-7.2). Intolerant to the accumulation of nitrates on the bottom.

Compatibility and Tankmates: Perfect with medium or large tetras and peaceful cichlids (Severum, Geophagus, Satanoperca). Keep only one male per tank or provide abundant visual distances between dens to avoid chronic stress.

Aquarium Reproduction: Cave spawner. Reproduction requires very soft water and cool water changes to trigger it. The male takes care of the brood (20-40 huge yellow eggs) trapping it in the cave and fanning oxygen.

Risks and Diseases: Suffers from bacterial ulcers or fin erosion if organic debris rots under the rocks of its territory. A strict bottom siphoning protocol is essential.